CN219714702U - Optical module calibration device - Google Patents
Optical module calibration device Download PDFInfo
- Publication number
- CN219714702U CN219714702U CN202320888142.0U CN202320888142U CN219714702U CN 219714702 U CN219714702 U CN 219714702U CN 202320888142 U CN202320888142 U CN 202320888142U CN 219714702 U CN219714702 U CN 219714702U
- Authority
- CN
- China
- Prior art keywords
- optical module
- calibration
- optical
- calibration device
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 252
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 238000006073 displacement reaction Methods 0.000 description 20
- 230000001788 irregular Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
The utility model relates to an optical module calibration device, and belongs to the technical field of optical module calibration. The calibration device comprises a calibration plate, an adjusting mechanism and a positioning mechanism; the calibration plate and the adjusting mechanism are coaxially arranged, and the positioning mechanism is arranged on the adjusting mechanism; the positioning mechanism comprises a first optical platform, a positioning piece and a plurality of laser range finders, wherein an optical module to be measured passes through the positioning piece and is installed on the first optical platform, and the plurality of laser range finders are flush or parallel with the transmitting end face of the optical module to be measured and are used for realizing initialization adjustment and distance calibration. By adopting the utility model, the calibration device can calibrate the optical modules with various shapes, is not limited by the shapes of the optical modules, further enhances the universality of the calibration device, and can meet the calibration requirements of various optical modules.
Description
Technical Field
The present utility model relates to the field of optical module calibration technology, and more particularly, to an optical module calibration device.
Background
The optical module calibration device is used for calibrating the optical module to screen out qualified optical modules and evaluate the measurement accuracy of the optical modules.
The current calibration device for the optical module has more limitations, and is difficult to meet the calibration requirement of the optical module.
Disclosure of Invention
The utility model provides an optical module calibration device which can solve the problems that the limitations in the related technology are more and the calibration requirement of an optical module is difficult to meet. The technical scheme is as follows:
according to the utility model, an optical module calibration device is provided, and comprises a calibration plate, an adjusting mechanism and a positioning mechanism;
the calibration plate and the adjusting mechanism are coaxially arranged, and the positioning mechanism is arranged on the adjusting mechanism;
the positioning mechanism comprises a first optical platform, a positioning piece and a plurality of laser range finders, wherein an optical module to be measured passes through the positioning piece and is installed on the first optical platform, and the plurality of laser range finders are flush or parallel with the transmitting end face of the optical module to be measured and are used for realizing initialization adjustment and distance calibration.
In one possible embodiment, the positioning member includes an adapter plate vertically mounted to the first optical platform;
the plurality of laser range finders and the optical module to be measured are both installed on the adapter plate.
In one possible implementation manner, the number of the laser range finders is three, and the laser range finders are arranged in a delta shape.
In one possible embodiment, the positioning member comprises a resilient compression sheet and a plurality of support members;
the plurality of supporting pieces are positioned between the first optical platform and the optical module to be tested;
one end of the elastic pressing piece is fixed on the first optical platform, and the other end of the elastic pressing piece is pressed on the top of the optical module to be tested.
In one possible embodiment, the support comprises a proof mass.
In one possible embodiment, the support comprises a support column.
In one possible embodiment, the adjustment mechanism comprises a second optical stage, an XY axis turntable, and a Z axis turntable;
the XY-axis turntable is mounted on the second optical platform, the Z-axis turntable is mounted on the XY-axis turntable, and the first optical platform is mounted on the Z-axis turntable.
In one possible embodiment, the adjustment mechanism comprises a rail and a slider;
the sliding block and the track are installed in a sliding mode, and the positioning mechanism is installed on the sliding block.
In a possible embodiment, the calibration device further comprises a third optical platform, on which the calibration plate and the adjustment mechanism are both located.
In one possible implementation, the optical module to be tested includes a laser radar module, a time-of-flight TOF module, and a line laser module.
In the embodiment of the utility model, the distance between the optical module to be measured and the calibration plate can be determined by the laser range finder, so that the distance calibration can be realized by using the laser range finder, the near-distance calibration and the far-distance calibration can be realized, the far-distance calibration is not limited by the length limitation of the calibration workbench, the far-distance calibration of the optical module can be further satisfied, and the universality of the calibration device is enhanced.
In addition, the locating piece of the calibration device comprises an adapter plate, an elastic pressing piece and a plurality of supporting pieces, so that the optical module with a regular appearance can be located on the calibration device through the adapter plate, and the optical module with an irregular appearance can be located on the calibration device through the elastic pressing piece and the supporting pieces. Furthermore, the calibration device can calibrate the optical modules with various shapes, is not limited by the shapes of the optical modules, further enhances the universality of the calibration device, and can meet the calibration requirements of various optical modules.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a schematic diagram of a calibration device according to an embodiment;
FIG. 2 is a schematic diagram of a calibration device according to an embodiment;
FIG. 3 is a schematic diagram illustrating the installation of an optical module to be tested and a plurality of laser rangefinders on an interposer, according to an embodiment;
FIG. 4 is a schematic diagram showing an elastic press sheet positioning an optical module to be tested on a first optical platform according to an embodiment;
fig. 5 is a schematic diagram showing an elastic pressing piece for positioning an optical module to be tested on the first optical platform according to an embodiment.
Description of the drawings
1. A calibration plate; 2. an adjusting mechanism; 3. a positioning mechanism; 4. a third optical stage; 5. an optical module to be tested.
21. A second optical stage; 22. an XY axis turntable; 23. a Z-axis turntable; 24. a track; 25. a sliding block.
31. A first optical stage; 32. a positioning piece; 33. a laser range finder.
321. An adapter plate; 322. elastic tabletting; 323. and a support.
Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.
The terminology used in the description of the embodiments of the disclosure is for the purpose of describing the embodiments of the disclosure only and is not intended to be limiting of the disclosure. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," "third," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.
The embodiment of the utility model provides an optical module calibration device which is used for calibrating an optical module, wherein the optical module can be a laser radar module, a time of flight (TOF) module, a line laser module and the like.
However, the current calibration device is generally limited, for example, the length of the workbench of the calibration device is limited, and it is difficult to perform remote calibration, and only short-distance calibration can be performed. For another example, the positioning mechanism of the calibration device is limited, so that only optical modules with specific shapes can be calibrated, and the optical modules with various shapes are difficult to calibrate. Therefore, the current calibration device has more limitations, and is difficult to meet the calibration requirement of the optical module.
The calibration device provided by the utility model can be used for calibrating optical modules at a short distance and a long distance, can be used for calibrating optical modules with various shapes, and can be used for calibrating various types of optical modules.
As shown in fig. 1 and 2, the calibration device includes a calibration plate 1, an adjusting mechanism 2, and a positioning mechanism 3. The calibration plate 1 and the adjusting mechanism 2 are coaxially arranged, the positioning mechanism 3 is installed on the adjusting mechanism 2, and the optical module 5 to be tested is positioned on the positioning mechanism 3.
The calibration plate 1 and the adjusting mechanism 2 are coaxially arranged, for example, as shown in fig. 1, a central axis of the calibration plate 1 along the X axis coincides with a central axis of the adjusting mechanism 2 along the X axis.
The adjustment mechanism 2 may include a displacement adjustment mechanism, a posture adjustment mechanism, a displacement adjustment mechanism, and a posture adjustment mechanism, and will be described in detail below with respect to the adjustment mechanism 2.
In one example, the positioning mechanism 3 is mounted on the adjusting mechanism 2, and the optical module 5 to be measured is positioned on the positioning mechanism 3, so that when the adjusting mechanism 2 is adjusted, the position and/or the posture of the optical module 5 to be measured can be caused to change, and thus, the position and/or the posture of the optical module 5 to be measured can be adjusted by the adjusting mechanism 2.
The optical module 5 to be tested can be a laser radar module, a TOF module, a line laser module and the like.
As for positioning the optical module 5 to be measured on the positioning mechanism 3, specifically, as shown in fig. 2, the positioning mechanism 3 may include a first optical platform 31, a positioning member 32, and a plurality of laser rangefinders 33. The optical module 5 to be measured is positioned on the first optical platform 31 through the positioning piece 32, the plurality of laser rangefinders 33 are flush or parallel to the emission end surface of the optical module 5 to be measured, and the plurality of laser rangefinders 33 are used for realizing initialization adjustment and distance calibration.
Wherein the first optical platform provides support for the positioning member 32 and the plurality of laser rangefinders 33 and ensures absolute level conditions with standard screw mounting holes thereon.
Wherein, the locating piece 32 mainly realizes the centre gripping locate function, can guarantee to mark the in-process, and the optical module that awaits measuring can be steadily placed in suitable position all the time.
In one example, the laser emitting end surfaces of the plurality of laser rangefinders 33 are flush or parallel with the laser emitting end surfaces of the optical module 5 to be measured, so that the distance between the optical module 5 to be measured and the calibration plate 1 can be determined by reading of the laser rangefinders 33.
For example, the emitting end face of the laser range finder is flush with the emitting end face of the optical module to be measured, so that the distance between the laser range finder and the calibration plate 1 is equal to the distance between the optical module to be measured and the calibration plate 1, and further, the distance reading of the laser range finder is the distance between the optical module to be measured and the calibration plate 1.
For another example, the emitting end face of the laser range finder is parallel to the emitting end face of the optical module to be measured, so that the distance between the optical module to be measured and the calibration plate 1 can be determined by the distance between the laser range finder and the calibration plate 1 and the distance between the laser range finder and the optical module to be measured.
Therefore, the laser range finder can be used for carrying out distance calibration on the optical module to be tested, and can be used for carrying out close-range calibration and long-range calibration.
The laser rangefinder 33 can realize the distance calibration, and the initialization adjustment can also be realized to the cooperation of a plurality of laser rangefinders 33.
The initialization is a state of the optical module to be tested on the calibration device, the state can be used as a reference state, and the subsequent calibration of the optical module to be tested under various states is carried out on the basis of the initialization state.
The initialization state of the optical module to be tested may be that its optical axis is perpendicular to the calibration plate 1. Alternatively, when the optical module to be tested includes a plurality of laser emission ends and the optical axes of the plurality of laser emission ends intersect, the initialization state of the optical module to be tested may be that the optical axes of the plurality of laser emission ends are all parallel to the first optical platform 31.
The process of implementing the initialization adjustment by the plurality of laser rangefinders 33 may be that when the readings of the plurality of laser rangefinders 33 are equal by the adjustment of the adjustment mechanism 2, the optical module to be measured can be considered to be in an initialized state, and the optical axis of the optical module to be measured is perpendicular to the calibration board 1.
In one example, the number of the laser rangefinders may be three, as shown in fig. 3, and the three laser rangefinders may be arranged in a delta shape, so that the three laser rangefinders uniquely determine a plane, and when the readings of the three laser rangefinders are equal, the plane where the three laser rangefinders are located may be considered to be parallel to the calibration plate. The emission end face of the laser range finder is flush or parallel with the emission end face of the optical module to be measured, so that the emission end face of the optical module to be measured is also parallel with the calibration plate, and the optical axis of the optical module to be measured is vertical to the calibration plate.
Based on the above, the laser range finder can determine the distance between the optical module to be measured and the calibration plate, so the laser range finder can be used for realizing distance calibration, and the near-distance calibration and the far-distance calibration can be realized, so the far-distance calibration is not limited by the length limitation of the calibration workbench, the far-distance calibration of the optical module can be further satisfied, and the universality of the calibration device is enhanced.
In one example, the calibration device may calibrate optical modules of various configurations through various structures included in the positioning member 32, thereby further enhancing the versatility of the laser rangefinder.
For example, as shown in fig. 2, the positioning member 32 may include an adapter plate 321, the adapter plate 321 is vertically mounted on the first optical platform 31, and the plurality of laser rangefinders 33 and the optical module 5 to be measured are mounted on the adapter plate 321.
As an example, as shown in fig. 3, the number of laser rangefinders 33 is three, one is located above the optical module 5 to be measured, the other two is located below the optical module 5 to be measured, and the three laser rangefinders 33 form a delta arrangement.
In one example, after the optical module 5 to be tested is mounted on the adapter plate 321, the optical axis of the optical module 5 to be tested is perpendicular to the adapter plate 321, so before calibration, the adapter plate 321 is only required to be adjusted to be parallel to the calibration plate.
In order to realize that the optical module 5 to be tested is mounted on the adapter plate 321, i.e. perpendicular to the adapter plate 321, the optical module 5 to be tested is a regular optical module. For example, the packaged optical module has a regular shape, so the positioning member includes a calibration device of the adapter plate 321, which can be used to calibrate the packaged optical module.
In one example, since the relationship between the adapter plate 321 and the first optical platform 31 has already been calibrated, and the relationship between the adapter plate 321 and the calibration plate 1 has also been calibrated, the accuracy of positioning the optical module 5 to be measured on the adapter plate 321 for calibration is high.
As another example, as shown in fig. 4 and 5, the positioning member 32 may include an elastic pressing piece 322 and a plurality of supporting members 323, wherein the plurality of supporting members 323 are located between the first optical platform 31 and the optical module 5 to be tested, and one end of the elastic pressing piece 322 is fixed on the first optical platform 31, and the other end is pressed on the top of the optical module 5 to be tested.
In the case where the positioning member 32 includes the elastic pressing piece 322 and the plurality of supporting members 323, it can be used to calibrate the optical module having irregular shape. For example, the supporting member 323 may be a standard mass block, and if the bottom of the optical module 5 to be tested has a plurality of facets with different heights, the standard mass block may be placed on the bottom of the optical module to be tested, so that the optical module to be tested is in a horizontal state, and the optical axis of the standard mass block can be perpendicular to the calibration plate. In order to maintain the stability of the optical module under test, the elastic pressing piece 322 is pressed on top of the optical module under test again.
For another example, as shown in fig. 5, the supporting member 323 may be a supporting column, and the shape of the optical module to be tested is any irregular shape, so that the bottom of the optical module to be tested may be supported by a plurality of supporting columns, and the heights of the supporting columns are not all equal, so that the optical module to be tested may be in a horizontal state, and the optical axis of the optical module to be tested may be parallel to the first optical platform. And then the elastic pressing sheet 322 is pressed on the top of the optical module to be tested, so as to complete the positioning of the optical module to be tested.
In general, before packaging, the optical module may be positioned by using the elastic pressing sheet 322 and the plurality of supporting members 323, and then calibrated to screen out qualified optical modules, and then packaged by using the qualified optical modules, and after packaging, the optical modules have regular shapes, the optical module may be positioned by using the adapter plate 321, and then calibrated and tested with high precision.
Based on the above, the positioning element 32 of the calibration device includes the adapter plate 321, the elastic pressing plate 322 and the plurality of supporting elements 323, if the appearance of the optical module to be measured is regular, or if the requirement of the optical module to be measured on the calibration precision is high, the adapter plate 321 can be selected to position the optical module to be measured, and then high-precision calibration is performed. If the shape of the optical module to be measured is irregular, or the shape is complex, or the requirement of the optical module to be measured on the calibration precision is not high, the elastic pressing piece 322 and the plurality of supporting pieces 323 can be selected to position the optical module to be measured, and then the calibration is performed.
Therefore, the optical module with a regular appearance can be calibrated by the calibration device, the optical module with an irregular appearance and even a complex appearance can be calibrated, and furthermore, the optical module with various appearances can be calibrated by the calibration device, so that the universality of the calibration device is enhanced.
The above description is about the structure included in the positioning member 32, and the structure included in the adjustment mechanism 2 will be described below.
In one example, since the calibration device includes a laser range finder, the distance calibration can be performed by the laser range finder, and then the adjustment mechanism 2 can only perform posture adjustment, and displacement adjustment between the optical module to be measured and the calibration plate can be achieved by the laser range finder.
Accordingly, the adjustment mechanism 2 may comprise a posture adjustment assembly, wherein the posture adjustment assembly comprises a second optical stage 21, an XY axis turntable 22 and a Z axis turntable 23, wherein the second optical stage 21 functions similarly to the first optical stage 31, providing a horizontal condition for the supported XY axis turntable 22 and Z axis turntable 23, with standard screw mounting holes thereon.
Wherein the XY axis turntable 22 is rotatable about the X axis and also rotatable about the Y axis, and the Z axis turntable 23 is rotatable about the Z axis, wherein the angular range of rotation about each axis can be set as desired.
As shown in fig. 2, the XY-axis turntable 22 is mounted on the second optical stage 21, the Z-axis turntable 23 is mounted on the XY-axis turntable, and the first optical stage 31 of the positioning mechanism 3 is mounted on the Z-axis turntable 23. Therefore, the posture of the optical module to be measured can be adjusted by controlling the adjusting mechanism 2 to rotate around each axis by a certain angle, and the optical module to be measured is calibrated under each posture.
In one example, the adjustment mechanism 2 may also perform a displacement adjustment, and correspondingly, the adjustment mechanism 2 may also include a displacement adjustment assembly, as shown in fig. 1 and referring to fig. 2, the displacement adjustment assembly of the adjustment mechanism 2 may include a rail 24 and a slider 25, the slider 25 and the rail 24 being slidably mounted, and the positioning mechanism 3 being mounted on the slider 25.
For example, the positioning mechanism 3 may be mounted on the slider 25 by a posture adjustment assembly of the adjustment mechanism 2, specifically, the second optical stage 21 of the posture adjustment assembly is mounted on the slider 25, and the XY-axis turntable 22 is mounted on the second optical stage 21, the Z-axis turntable 23 is mounted on the XY-axis turntable, and the first optical stage 31 of the positioning mechanism 3 is mounted on the Z-axis turntable 23. Thus, the positioning mechanism 3 can be mounted on the slider 25 by the posture adjustment assembly.
Because the length of the track 24 is limited, the calibration device can calibrate the optical module to be measured in a short distance through the displacement adjustment component of the adjustment mechanism 2, and calibrate the optical module to be measured in a long distance through the laser range finder.
In the near-distance calibration, after the optical module to be measured is installed on the calibration device, the initial adjustment is completed once, and the calibration under a plurality of distances can be realized only by controlling the moving distance of the sliding block 25 on the track 24.
In one example, as shown in fig. 1, the calibration device may further comprise a third optical bench 4, the third optical bench 4 providing support and absolute horizontal conditions for the other components of the calibration device. Then, as shown in fig. 1, the calibration plate 1 and the adjustment mechanism 2 are both located on the third optical stage 4, and coaxially arranged on the third optical stage 4.
For example, the calibration plate 1 and the rail 24 are coaxially arranged along the X-axis on the third optical stage 4, that is, the central axis of the calibration plate 1 in the X-axis coincides with the central axis of the rail 24 in the X-axis. And the slider 25 is slidably mounted on the rail 24. The second optical stage 21 is fixed on the slider 25, the XY-axis turntable 22 is mounted on the second optical stage 21, the Z-axis turntable 23 is mounted on the XY-axis turntable 22, and the first optical stage 31 is mounted on the Z-axis turntable 23. The optical module 5 to be tested is positioned on the first optical platform 31 by the positioning member 32. For example, as shown in fig. 2, the optical module 5 to be tested is positioned on the adapter plate 321. As another example, as shown in fig. 4 and 5, the optical module 5 to be tested is positioned on the first optical platform 31 by the elastic pressing piece 322 and the plurality of supporting pieces 323.
Based on the above, the calibration device can calibrate the optical module to be tested under the following scene.
The optical axis of the optical module to be tested may be perpendicular to the calibration board, for example, the optical module to be tested may be a TOF module.
Scene 1, performing close-range calibration on an optical module to be tested, wherein the calibration process can be as follows:
first, the positioning member 32 is selected according to the shape and calibration accuracy requirements of the optical module to be tested.
For example, if the shape of the optical module to be tested is regular, or the requirement of the optical module to be tested on the calibration accuracy is high, the adaptor plate 321 may be selected to clamp and position the optical module to be tested. If the shape of the optical module to be tested is irregular or complex, the elastic pressing piece 322 and the plurality of supporting pieces 323 can be selected to clamp and position the optical module to be tested.
And secondly, initializing and adjusting the optical module to be tested.
If the adapter plate 321 is selected to clamp and position the optical module to be tested, the parallel relation between the adapter plate 321 and the calibration plate 8 is already calibrated, and the optical axis of the optical module to be tested can be perpendicular to the adapter plate 321 after the optical module to be tested is mounted on the adapter plate 321, so that when the optical module to be tested is positioned by using the adapter plate 321, initialization adjustment is not needed.
If the elastic pressing piece 322 and the plurality of supporting pieces 323 are selected, the optical module to be tested needs to be initially adjusted by means of the plurality of laser rangefinders and the adjusting mechanism 2 when being clamped and positioned. For example, the adjusting mechanism 2 is controlled to adjust the posture of the optical module to be measured until the readings of the plurality of laser rangefinders are equal, so that the optical axis of the optical module to be measured is perpendicular to the calibration plate.
And finally, calibrating the optical module to be tested under each pose needing calibration.
For example, in the process of calibrating the gesture, the optical module to be measured is adjusted to the gesture required to be calibrated through the XY axis turntable 22 and the Z axis turntable 23 of the adjusting mechanism 2, then under the gesture, the laser emitted by the optical module to be measured is emitted to the calibration plate 1, and is reflected to the optical module to be measured through the calibration plate, so that the calibration data under the current gesture can be obtained. Thus, the calibration data of the optical module to be measured under each gesture to be calibrated can be obtained.
For example, when the distance is calibrated, the optical module to be measured is adjusted to the displacement required to be calibrated through the track 24 and the slide block 25 of the adjusting mechanism 2, then under the displacement, the laser emitted by the optical module to be measured is emitted to the calibration plate 1, and is reflected to the optical module to be measured through the calibration plate, so that the calibration data under the current displacement can be obtained. Thus, the calibration data of the optical module to be measured under each displacement to be calibrated can be obtained.
It should be noted that, in the distance calibration, since the optical module to be measured moves along the rail 24 to adjust its displacement, and the rail 24 and the slider 25 are calibrated in the assembly, that is, the rail 24 is in an absolute horizontal state, no matter how the slider 25 slides, the vertical relationship between the optical axis of the optical module to be measured and the calibration plate is not changed, so that the initial adjustment is completed before the distance calibration.
Scene 2: the optical module to be tested is calibrated remotely, and the calibration process can be as follows:
first, the positioning member 32 is selected according to the shape and calibration accuracy requirements of the optical module to be tested.
The process of selecting the positioning member 32 may be referred to above, and will not be described herein.
And secondly, initializing and adjusting the optical module to be tested.
Because of the remote calibration, the adjustment mechanism 2 is no longer mounted on the slide 25, and thus, no matter which positioning element 32 is selected, an initial adjustment is required.
For example, the adjusting mechanism 2 is controlled to adjust the posture of the optical module to be measured until the readings of the plurality of laser rangefinders are equal, so that the optical axis of the optical module to be measured is perpendicular to the calibration plate.
And finally, calibrating the optical module to be tested under each pose needing calibration.
For example, when the gesture is calibrated, the optical module to be measured is adjusted to the gesture required to be calibrated by the adjusting mechanism 2, then under the gesture, the laser emitted by the optical module to be measured is emitted to the calibration plate 1, and is reflected to the optical module to be measured by the calibration plate, so that the calibration data under the current gesture can be obtained. Thus, the calibration data of the optical module to be measured under each gesture to be calibrated can be obtained.
In the distance calibration, since the required calibration distance is large and exceeds the formation of the rail 24, either the slide 25 is detached from the rail 24 to perform the distance calibration or the adjustment mechanism 2 is detached from the slide 25 to perform the distance calibration.
The distance between the optical module to be measured and the calibration plate 1 can be determined by the reading of the laser range finder, and then the optical module to be measured can be adjusted to the displacement required to be calibrated by adjusting the reading of the laser range finder, then under the displacement, the laser emitted by the optical module to be measured is emitted to the calibration plate 1 and reflected to the optical module to be measured by the calibration plate, so that the calibration data under the current displacement can be obtained. Thus, the calibration data of the optical module to be measured under each displacement to be calibrated can be obtained.
It should be noted that, when the optical module to be measured performs distance calibration, since the optical module to be measured does not adjust the displacement on the absolute horizontal platform, the optical axis of the optical module to be measured is perpendicular to the calibration plate when the displacement is changed once, and therefore, the initial adjustment is required before the calibration is performed under the current displacement when the displacement is changed once.
In the embodiment of the utility model, the distance between the optical module to be measured and the calibration plate can be determined by the laser range finder, so that the distance calibration can be realized by using the laser range finder, the near-distance calibration and the far-distance calibration can be realized, the far-distance calibration is not limited by the length limitation of the calibration workbench, the far-distance calibration of the optical module can be further satisfied, and the universality of the calibration device is enhanced.
In addition, the locating piece of the calibration device comprises an adapter plate, an elastic pressing piece and a plurality of supporting pieces, so that the optical module with a regular appearance can be located on the calibration device through the adapter plate, and the optical module with an irregular appearance can be located on the calibration device through the elastic pressing piece and the supporting pieces. Furthermore, the calibration device can calibrate the optical modules with various shapes, is not limited by the shapes of the optical modules, and further enhances the universality of the calibration device.
The foregoing description of the preferred embodiments of the present utility model is not intended to be limiting, but rather, any modifications, equivalents, improvements, etc. that fall within the principles of the present utility model are intended to be included within the scope of the present utility model.
Claims (10)
1. An optical module calibration device is characterized by comprising a calibration plate (1), an adjusting mechanism (2) and a positioning mechanism (3);
the calibration plate (1) and the adjusting mechanism (2) are coaxially arranged, and the positioning mechanism (3) is arranged on the adjusting mechanism (2);
the positioning mechanism (3) comprises a first optical platform (31), a positioning piece (32) and a plurality of laser range finders (33), wherein the optical module to be measured (5) is installed on the first optical platform (31) through the positioning piece (32), and the emission end faces of the plurality of laser range finders (33) and the optical module to be measured (5) are flush or parallel and are used for realizing initialization adjustment and distance calibration.
2. The calibration device according to claim 1, characterized in that the positioning element (32) comprises an adapter plate (321), the adapter plate (321) being mounted vertically on the first optical platform (31);
the plurality of laser range finders (33) and the optical module to be measured (5) are both arranged on the adapter plate (321).
3. The calibration device according to claim 2, characterized in that the number of laser rangefinders (33) is three, arranged in a delta-shape.
4. The calibration device according to claim 1, characterized in that the positioning element (32) comprises an elastic presser (322) and a plurality of support elements (323);
the plurality of supports (323) are positioned between the first optical platform (31) and the optical module (5) to be tested;
one end of the elastic pressing piece (322) is fixed on the first optical platform (31), and the other end of the elastic pressing piece is pressed on the top of the optical module (5) to be tested.
5. Calibration device according to claim 4, characterized in that the support (323) comprises a proof mass.
6. Calibration device according to claim 4, wherein the support (323) comprises a support column.
7. Calibration device according to claim 1, characterized in that the adjustment mechanism (2) comprises a second optical stage (21), an XY-axis turret (22) and a Z-axis turret (23);
the XY-axis turntable (22) is mounted on the second optical platform (21), the Z-axis turntable (23) is mounted on the XY-axis turntable (22), and the first optical platform (31) is mounted on the Z-axis turntable (23).
8. Calibration device according to claim 1, wherein the adjustment mechanism (2) comprises a track (24) and a slider (25);
the sliding block (25) and the track (24) are slidably mounted, and the positioning mechanism (3) is mounted on the sliding block (25).
9. The calibration device according to claim 1, characterized in that it further comprises a third optical platform (4), said calibration plate (1) and said adjustment mechanism (2) being both located on said third optical platform (4).
10. The calibration device according to any one of claims 1 to 9, wherein the optical module to be measured comprises a laser radar module, a time of flight TOF module and a line laser module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320888142.0U CN219714702U (en) | 2023-04-19 | 2023-04-19 | Optical module calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320888142.0U CN219714702U (en) | 2023-04-19 | 2023-04-19 | Optical module calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219714702U true CN219714702U (en) | 2023-09-19 |
Family
ID=87981292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320888142.0U Active CN219714702U (en) | 2023-04-19 | 2023-04-19 | Optical module calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219714702U (en) |
-
2023
- 2023-04-19 CN CN202320888142.0U patent/CN219714702U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103454619A (en) | Electrical axis optical calibration system of spaceborne microwave tracking-pointing radar and calibration method thereof | |
| CN110487220B (en) | Device and method for adjusting and detecting consistency of optical axes of space laser communication terminal | |
| CN108519103B (en) | Stable platform multi-attitude precision synchronous evaluation device and method using autocollimator | |
| CN107607041B (en) | One kind being used for six geometric error measuring devices of turntable | |
| CN112476315B (en) | Assembling method and system for flat array SAR antenna unfolding system | |
| CN108132029B (en) | Accurate measurement method and device for assembly of satellite antenna unfolding system | |
| CN109696121A (en) | A kind of quick calibration method based on laser interferometer light path | |
| CN114577448B (en) | Double-optical-axis calibration method of novel portable optical-axis calibration target adaptation device | |
| CN107588929B (en) | Calibration method and calibrator for spherical screen projection/tracking system | |
| CN219714702U (en) | Optical module calibration device | |
| CN100363712C (en) | Equipment used for space position precise measurement | |
| CN114046965A (en) | Optical axis calibration device and calibration method for multi-type avionics equipment of airplane | |
| CN108983382B (en) | Multi-degree-of-freedom optical adjusting device and adjusting method | |
| CN108645338B (en) | PSD-based self-calibration method and device for annunciator under vacuum | |
| CN114858096B (en) | Horizontal light path transfer goniometer and measuring method | |
| CN109061894B (en) | Ultra-precise collimating instrument and collimating method of giant optical plane reflection array device | |
| CN109405853B (en) | Star sensor integrated calibration device and method | |
| CN111998775A (en) | Device for high-precision real-time measurement of moving sliding table posture | |
| CN114216396B (en) | Compound eye unit motion error measuring device based on laser interferometer | |
| CN113513986B (en) | Geometric tolerance measuring device and measuring method thereof | |
| CN110954131A (en) | Tool for calibrating misalignment angle of input shaft of fiber-optic gyroscope | |
| CN112827754B (en) | Automatic packaging equipment for MEMS friction resistance sensor based on visual positioning technology | |
| CN114858097A (en) | Laser radar rotating mirror included angle measuring method and device | |
| CN113296083A (en) | Laser radar target simulation test system | |
| CN113960542A (en) | Device and method for measuring azimuth pointing accuracy of radar servo seat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |